drm/bridge/sii8620: fix disconnect sequence

The patch allows to avoid rare cases when discovery fails.
Signed-off-by: Andrzej Hajda <a.hajda@samsung.com>
Signed-off-by: Archit Taneja <architt@codeaurora.org>
Link: http://patchwork.freedesktop.org/patch/msgid/1485935272-17337-19-git-send-email-a.hajda@samsung.com

drivers/gpu/drm/bridge/sil-sii8620.c

@@ -1287,10 +1287,12 @@ static void sii8620_disconnect(struct sii8620 *ctx)
 {
 	sii8620_disable_gen2_write_burst(ctx);
 	sii8620_stop_video(ctx);
-	msleep(50);
+	msleep(100);
 	sii8620_cbus_reset(ctx);
 	sii8620_set_mode(ctx, CM_DISCONNECTED);
 	sii8620_write_seq_static(ctx,
+		REG_TX_ZONE_CTL1, 0,
+		REG_MHL_PLL_CTL0, 0x07,
 		REG_COC_CTL0, 0x40,
 		REG_CBUS3_CNVT, 0x84,
 		REG_COC_CTL14, 0x00,